System Sensor B401BR User manual

D450-02-00 1 I56-352-06R
B401BR Plug-in Detector Base
INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue
St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which pro-
vides detailed information on detector spacing, placement,
zoning, wiring, and special applications. Copies of this man-
ual are available at no charge from System Sensor. (For
installations in Canada, refer to CAN4-S524, Standard for the
Installation of Fire Alarm Systems, and CEC Part 1, Sec. 32.)
NOTICE: This manual should be left with the owner/user
of this equipment.
IMPORTANT: The detector used with this base must be
tested and maintained regularly following NFPA 72 require-
ments. The detector used with this base should be cleaned
at least once a year.
Specifications
Base Diameter: 6.2 inches (157 mm) typical
Base Height: 1.1 inches (29 mm) typical
Weight: 0.3 lb. (130 g) typical
Mounting: 4 inch square box with or without plaster ring. Min. Depth: 1.5 inches
4 inch octagon box. Min. Depth: 1.5 inches
3-1/2 inch octagon box. Min. Depth: 1.5 inches
Operating Temperature Range: –10° to 60°C (14° to 140°F)
Note: Do not install where normal ambient temperature extends beyond 0° to 49°
(32° to 120°F)
Operating Humidity Range: 10% to 93% Relative Humidity
Electrical Ratings — includes base and detector
System Voltage: 24 VDC
Maximum Ripple Voltage: 4 Volts peak to peak
Start-up Capacitance: 0.02 µF Maximum
Standby Ratings: 17 VDC Minimum
32 VDC Maximum
120 µA Maximum
Alarm Ratings: 10 mA Minimum at 10.5 VDC
62 mA Maximum at 32 VDC
The optional RA400Z Remote Annunciator operates within the specified detector
alarm currents.
Reset Voltage: 2.50 VDC Minimum
Reset Time: 0.3 Sec Maximum
Start-up Time: 34.0 Sec Maximum
For use with the following detectors: 1451, 2451, and 2451TH
General Description
The plug-in detector base B401BR is used with System
Sensor 400 Series photoelectronic, ionization, and heat
detector heads. The ability to accept a variety of detector
heads makes this base more versatile than equivalent
direct-wired models. Refer to the System Sensor catalog for
other available plug-in detector bases.
This B401BR base is intended for use in 2-wire systems,
with screw terminals provided for power, ground, and
remote annunciator connections. The B401BR base also
contains a resistor to provide current limiting in the alarm
state.

D450-02-00 2 I56-352-06R
Mounting
This detector base mounts directly to 31⁄2inch and 4 inch
octagon boxes, and 4 inch square boxes (with or without
plaster rings). To mount, remove decorative ring by turning
it in either direction to unhook the snaps, then separate the
ring from the base.
Install the base to the box using the screws supplied with
the junction box and the appropriate mounting slots in the
base. Place decorative ring onto base, then turn in either
direction until the ring snaps in place (see Figure 1).
Installation Guidelines
All wiring must be installed in compliance with the
National Electrical Code and the local codes having juris-
diction. Proper wire gauges should be used. The conduc-
tors used to connect smoke detectors to control panels and
accessory devices should be color-coded to prevent wiring
mistakes. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring (the wiring between interconnected
detectors), it is recommended that the wire be no smaller
than 18 gauge (1.0 square mm). Wire sizes up to 12 gauge
wire (2.5 square mm) may be used with the base. For best
system performance, the power (+ and –) loop wires
should be twisted pair and installed in separate grounded
conduit to protect the loop from electrical interference.
Smoke detectors and alarm system control panels have
specifications for allowable loop resistance. Consult the
control panel manufacturer’s specifications for the total
loop resistance allowed for the particular model control
panel being used before wiring the detector loops.
For system supervision — For terminals 2, 3, and 5 do not
use looped wire under terminals. Break wire run to provide
system supervision of connections.
Wire connections are made by simply stripping insulation
from the end of the wire, sliding the bare end of the wire
under the clamping plate, and tightening the clamping
plate screw. Use the strip gauge molded into the base for
ease of wiring to terminals.
System Sensor smoke detectors and mounting bases are
marked with a compatibility identifier located as the last
digit of a five digit code stamped on the back of the prod-
uct. Connect detectors/mounting bases only to compatible
control units as indicated in System Sensor’s compatibility
chart which contains a current list of UL listed control units
and detector head/base combinations. A copy of this list is
available from System Sensor upon request.
CAUTION
Figure 1. Mounting detector to box:
SNAP ON
DECORATIVE
RING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
SHORTING
SPRING
The zone wiring of the detector base should be checked
before the detector heads are installed in them. To make
this possible, this base contains a special spring-type short-
ing jumper. After a detector base is properly wired and
mounted on an electrical box, make sure that the jumper
spring is in contact with the base of Terminal 3. This tem-
porary connection shorts the negative-in and negative-out
leads and permits the wiring of the loop to be checked for
continuity.
Once all the detector bases have been wired and mounted,
and the loop wiring has been checked, the detector heads
may be installed in the bases. The shorting spring in the
base will disengage when the detector head is turned into
place.
A78-1175-01

D450-02-00 3 I56-352-06R
Tamper-resist Feature
Do not use the tamper resist feature if the XR5 removal tool
is to be used.
This detector base also includes an optional tamper resist
feature that, when activated, prevents removal of the detec-
tor without the use of a tool.
To activate this feature, break the tab from the detector
base, as shown in Figure 3A, and install the detector. To
remove the detector from the base once the tamper resist
feature has been activated, insert a small-bladed screw-
driver into the slot in the side of the base and press the
plastic lever away from the detector head (see Figure 3B).
This allows the detector to be rotated counterclockwise and
removed.
CAUTION
PLASTIC LEVER
BREAK TAB AT
DOTTED LINE BY
TWISTING TOWARD
CENTER OF BASE.
USE SMALL-BLADED
SCREWDRIVER TO
PUSH PLASTIC LEVER
IN DIRECTION OF
ARROW.
A78-1175-03
Figure 3B. Removing detector head from base:Figure 3A. Activating tamperproof feature:
2-WIRE CONTROL PANEL
1
23
4
5
REMOTE
ANNUNCIATOR
1
23
4
5
REMOTE
ANNUNCIATOR
E
O
L
OPTIONAL FAULT TOLERANT WIRING
NOTE: For system supervision - Do not loop wire under
terminals 2, 3, and 5. Break wire run to ensure
system supervision of connections.
+
–
+
–
–
+
–
+
Figure 2. Typical wiring diagram for 2-wire detector systems:
A78-1175-10
Note: Head removal after the tamper resist feature has
been activated first requires removal of the decora-
tive ring.
The tamper resist feature can be defeated by breaking and
removing the plastic lever from the base. However, this per-
manently defeats the tamper resist feature.

D450-02-00 4 I56-352-06R
©2001 System Sensor
Three-Year Limited Warranty
System Sensor warrants its enclosed smoke detector base to be free from
defects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this smoke detector base. No agent, represen-
tative, dealer, or employee of the Company has the authority to increase
or alter the obligations or limitations of this Warranty. The Company’s
obligation of this Warranty shall be limited to the repair or replacement of
any part of the smoke detector base which is found to be defective in
materials or workmanship under normal use and service during the three
year period commencing with the date of manufacture. After phoning
System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return
Authorization number, send defective units postage prepaid to: System
Sensor, Repair Department, RA #__________, 3825 Ohio Avenue, St.
Charles, IL 60174. Please include a note describing the malfunction and
suspected cause of failure. The Company shall not be obligated to repair or
replace units which are found to be defective because of damage, unrea-
sonable use, modifications, or alterations occurring after the date of man-
ufacture. In no case shall the Company be liable for any consequential or
incidental damages for breach of this or any other Warranty, expressed or
implied whatsoever, even if the loss or damage is caused by the Company’s
negligence or fault. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion
may not apply to you. This Warranty gives you specific legal rights, and
you may also have other rights which vary from state to state.
Please refer to insert for the Limitations of Fire Alarm Systems